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    <p>Apache License<br>
        Version 2.0, January 2004<br>
        <a href=
                   "http://www.apache.org/licenses/">http://www.apache.org/licenses/</a></p>
    <p>TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND
        DISTRIBUTION</p>
    <p><strong><a id="definitions" name="definitions">1.
        Definitions</a></strong>.</p>
    <p>"License" shall mean the terms and conditions for use,
        reproduction, and distribution as defined by Sections 1 through 9
        of this document.</p>
    <p>"Licensor" shall mean the copyright owner or entity authorized
        by the copyright owner that is granting the License.</p>
    <p>"Legal Entity" shall mean the union of the acting entity and
        all other entities that control, are controlled by, or are under
        common control with that entity. For the purposes of this
        definition, "control" means (i) the power, direct or indirect, to
        cause the direction or management of such entity, whether by
        contract or otherwise, or (ii) ownership of fifty percent (50%)
        or more of the outstanding shares, or (iii) beneficial ownership
        of such entity.</p>
    <p>"You" (or "Your") shall mean an individual or Legal Entity
        exercising permissions granted by this License.</p>
    <p>"Source" form shall mean the preferred form for making
        modifications, including but not limited to software source code,
        documentation source, and configuration files.</p>
    <p>"Object" form shall mean any form resulting from mechanical
        transformation or translation of a Source form, including but not
        limited to compiled object code, generated documentation, and
        conversions to other media types.</p>
    <p>"Work" shall mean the work of authorship, whether in Source or
        Object form, made available under the License, as indicated by a
        copyright notice that is included in or attached to the work (an
        example is provided in the Appendix below).</p>
    <p>"Derivative Works" shall mean any work, whether in Source or
        Object form, that is based on (or derived from) the Work and for
        which the editorial revisions, annotations, elaborations, or
        other modifications represent, as a whole, an original work of
        authorship. For the purposes of this License, Derivative Works
        shall not include works that remain separable from, or merely
        link (or bind by name) to the interfaces of, the Work and
        Derivative Works thereof.</p>
    <p>"Contribution" shall mean any work of authorship, including
        the original version of the Work and any modifications or
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        the copyright owner or by an individual or Legal Entity
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        copyright owner as "Not a Contribution."</p>
    <p>"Contributor" shall mean Licensor and any individual or Legal
        Entity on behalf of whom a Contribution has been received by
        Licensor and subsequently incorporated within the Work.</p>
    <p><strong><a id="copyright" name="copyright">2. Grant of
        Copyright License</a></strong>. Subject to the terms and
        conditions of this License, each Contributor hereby grants to You
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    <p><strong><a id="patent" name="patent">3. Grant of Patent
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        Contribution(s) with the Work to which such Contribution(s) was
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        that the Work or a Contribution incorporated within the Work
        constitutes direct or contributory patent infringement, then any
        patent licenses granted to You under this License for that Work
        shall terminate as of the date such litigation is filed.</p>
    <p><strong><a id="redistribution" name="redistribution">4.
        Redistribution</a></strong>. You may reproduce and distribute
        copies of the Work or Derivative Works thereof in any medium,
        with or without modifications, and in Source or Object form,
        provided that You meet the following conditions:</p>
    <ol style="list-style: lower-latin;">
        <li>You must give any other recipients of the Work or
            Derivative Works a copy of this License; and
        </li>
        <li>You must cause any modified files to carry prominent
            notices stating that You changed the files; and
        </li>
        <li>You must retain, in the Source form of any Derivative Works
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        </li>
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            or as an addendum to the NOTICE text from the Work, provided
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            modifying the License.<br>
            <br>
            You may add Your own copyright statement to Your modifications
            and may provide additional or different license terms and
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            modifications, or for any such Derivative Works as a whole,
            provided Your use, reproduction, and distribution of the Work
            otherwise complies with the conditions stated in this
            License.
        </li>
    </ol>
    <p><strong><a id="contributions" name="contributions">5.
        Submission of Contributions</a></strong>. Unless You explicitly
        state otherwise, any Contribution intentionally submitted for
        inclusion in the Work by You to the Licensor shall be under the
        terms and conditions of this License, without any additional
        terms or conditions. Notwithstanding the above, nothing herein
        shall supersede or modify the terms of any separate license
        agreement you may have executed with Licensor regarding such
        Contributions.</p>
    <p><strong><a id="trademarks" name="trademarks">6.
        Trademarks</a></strong>. This License does not grant permission
        to use the trade names, trademarks, service marks, or product
        names of the Licensor, except as required for reasonable and
        customary use in describing the origin of the Work and
        reproducing the content of the NOTICE file.</p>
    <p><strong><a id="no-warranty" name="no-warranty">7. Disclaimer
        of Warranty</a></strong>. Unless required by applicable law or
        agreed to in writing, Licensor provides the Work (and each
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        determining the appropriateness of using or redistributing the
        Work and assume any risks associated with Your exercise of
        permissions under this License.</p>
    <p><strong><a id="no-liability" name="no-liability">8. Limitation
        of Liability</a></strong>. In no event and under no legal theory,
        whether in tort (including negligence), contract, or otherwise,
        unless required by applicable law (such as deliberate and grossly
        negligent acts) or agreed to in writing, shall any Contributor be
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        inability to use the Work (including but not limited to damages
        for loss of goodwill, work stoppage, computer failure or
        malfunction, or any and all other commercial damages or losses),
        even if such Contributor has been advised of the possibility of
        such damages.</p>
    <p><strong><a id="additional" name="additional">9. Accepting
        Warranty or Additional Liability</a></strong>. While
        redistributing the Work or Derivative Works thereof, You may
        choose to offer, and charge a fee for, acceptance of support,
        warranty, indemnity, or other liability obligations and/or rights
        consistent with this License. However, in accepting such
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        responsibility, not on behalf of any other Contributor, and only
        if You agree to indemnify, defend, and hold each Contributor
        harmless for any liability incurred by, or claims asserted
        against, such Contributor by reason of your accepting any such
        warranty or additional liability.</p>
    <p>END OF TERMS AND CONDITIONS</p>
    <h1 id="apply">APPENDIX: How to apply the Apache License to your
        work<a class="headerlink" href="#apply" title=
                "Permanent link">?</a></h1>
    <p>To apply the Apache License to your work, attach the following
        boilerplate notice, with the fields enclosed by brackets "[]"
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        or class name and description of purpose be included on the same
        "printed page" as the copyright notice for easier identification
        within third-party archives.</p>
    <div class="codehilite">
    <pre>Copyright [yyyy] [name of copyright owner]

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
    </pre>
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